Fireproof floor.



No. 642,1;14.4 n Patented Feb. s, leon.

- e. KnocHE.

FIBEPRUF FLUB.

' (Application led luna 9, 1899.)

(No Mode.)

u N ums Pneus co, Puomumo. wnsnmsmu u c GOTTERIED KNOCHE,

or NEw'YoRK, N. Y.

FIREPROOF FLOOR.

SPECIFICATION forming part of Letters Patent No. 642,614, dated February6, 1900.

Application filed June 9, 1899. Serial No. 719,914. (No model.)

To all whom, t may concern:

Be it known that I, GOTTFRIED KNOCHE, a citizen of the United States,residing in the city of New York, in the borough of Manhattan and Stateof New York, have invented certain new aud useful Improvements inFireproof Floors, of which the following is a speciicatiou.

vMy invention relates to an improved fireproof floor which isconstructed of a suitable cement body in which transverse cavities ofconsiderable size are formed, so that the weight of the fireproof flooris greatly decreased, while the fire-resisting qualities of the same arenot in the least diminished; and the invention consists of a fireproofoor composed of suitable abutments mounted on the beams, a ceiling-layerconnecting the bases of the beams and abutments,transverse connectingportions between the abutments, a sounddeadening layer of suitablematerial extending over the ceiling-layer between the abutments, ribs orbricks extending transversely of and supported on side shoulders of thetransverse connecting portions, and a covering of cement extending overthe beams, abutments, ribs, and transverse connecting portions, as willbe fully described hereinafter, and finally pointed out in the claims.

In the accompanying drawings, Figure 1 represents a vertical transversesection of my improved cement floor as arranged between two beams of abuilding. Fig. 2 is a plan view of Fig. l with the covering-layer andsome ribs removed. Fig. 3 is a vertical transverse section on line 3 3,Fig. l; and Fig. 4 is a detail view of the form which is used.

Similar letters of reference indicate correspending parts.

Referring to the drawings, A represents a ceiling of' cement made ofsuitable thickness and held by the usual anchors, which are secured tothe beams, said ceiling extending below the bases of the beams. At bothsides of the beams are formed vcement abutments B of suitable thickness,which extend down to the ceiling A. Wooden forms or moldboxes W, havingslightly-tapering sides and ends, are then supported on the abutmentstransversely to the beams, said boxes being provided with projectingcleats lV at the upper edges of the sides, as shown in Fig. 4, and

the space between the boxes connecting the abutments B is filled up withcement, so as to form transverse connecting portions C, which areprovided at their upper edges, corresponding to the cleats W', withshouldersl C and with inclined sides corresponding to the sides of themold-boxes. The transverse connecting portions C may be reinforced bymeans of hat or corrugated metal plates O2, so as to impart additionalstrength to them. The Wooden boxes are then removed, and the lowerpartof the cavity formed by the same is filled up with a layer E of sand,ashes, or other sound-deadening material to a height of two or threeinches, as shown in Figs. 1 and 3. A number of brick ribs D or the likeare then placed at intervals apart on the shoulders C across the openingformed between the transverse connecting portions C, after which a layerF of cement is placed over the top of the beams and the ribs, so as toill the interstices between them.

By the construction described a number of transverse cavities are formedbetween the abutments B and the transverse connecting portio'ns C, bywhich the Weight of the reproof iioor is greatly reduced, while thecomplete embedding of the beams in the cement is obtained, so that notonly a strong iioor, but also a fireproof and sound-deadening floor forfireproof buildings, -is obtained.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. In a fireproof ioor, the combination, wi th thebeams, of abut-ments at both sides of the beams, a ceiling-layerextending below the beams and abutments, a layer of sand or otherdeadening material extending over the ceiling-layer between theabutments, transverse connecting portions connecting the abutments,spaced at suitable distances from each other, ribs extendingtransversely between said connecting portions, and a top layer of cementextending over the beams, abutments and ribs, substantially as setforth.

2. In a freproof iioor, the combination ,with the beams, of aceiling-layer extending below the beams, cement abutments extending atboth sides of said beams, a deadening-layer of sand or other materialplaced over the ceiling-layer between the abutments, transverse IOOconnecting portions of cement, extending be- In testimony that claim theforegoing as tween said abutlnents at a. suitable distance my inventionI have signed my name 1n pres- 1o from each other, and having inclinedside ence of two subscribing witnesses.

Walls, and shoulders at the upper edges of 1 5 the sides, ribs restingon the shoulders of the y GOTTB RIED KNOOHE transverse connectingportions, and a, layer Vitnesses: of cement extending over the top ofthe beams, PAUL. GOEPEL,

M. H. WURTZEL.

nbntments and ribs, substantially as set forth.

